Valve.



No. 719,750. PATBNTED FEB. 3, 1903.

VALVE.

APPLICATION FILED PEB. 19, 1902.

xo'MoDBL.

CQ. la Qq "Q for controllingV a hydraulic motor, the front UNTTED STATES PATENT FFICE.

FRANCIS E. COLLINS, OF CONSHOHOCKEN, PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent N o. 719,7 50, dated February 3, 1903. Application filed February 19, 1902. Serial No. 94,780. (No model.)

To a/ZZ whom, t may concern.'

Be it known that I, FRANCIS E. COLLINS, a citizen of the United States, residing at Conshohocken,in the county of Montgomerytate of Pennsylvania, have invented a new and useful Improvement in Valves, ot' which the following is a specication.

My invention consists of improvements in valves which although useful in many other connections are especially adapted for use in connection with high-pressure hydraulic motors, one of the principal objects being to prolong the life of the working faces of the valve and valve-seat, as will be hereinafter fully described and claimed.

My invention further consists in the features of construction and combination of parts hereinafter fully described and claimed.

Figure l represents a plan view of the valves and gearing embodying my invention plate of the valve-casin g being removed. Fig.V 2 represents a section thereof, taken on the line x of Fig. l. Fig. 3 represents a section taken on the line y y of Fig. l.

Similar letters of reference indicate corresponding parts in the gures.

Referring to the drawings, A designates the valve-casing, the same consisting of the baseplate B and front plate C, suitably secured together. The said base and front plates are recessed to form the chamberE and the auxiliary valve-chambers D and F,-the intermediate chamber E being larger than the side chambers D and F and being provided with an inlet port G, communicating with the source supplying water under pressure. The side chambers D and F are each provided with a valve-seat H and J, while the intermediate chamber has valve-seats K and L, said valve seats extending longitudinally within the chambers. In the bottom of the seats H and .I are ports M and N, through which the exhausts from the lower and upper sides respectively pass. These ports M and N have lower horizontal portions extending in opposite directions, as seen clearlyin Fig. 2. In the bottom of the seats K and L are the ports P and Q, respectively, which communicate, respectively, by means of passages R and S with the lower and upper sides of A branch passage the hydraulic cylinder.

T, leading from said passage R, and a branch passage U, leading from said passage S, terminate, respectively,'in ports V and W in the chambers D and F.

Mounted in the valve-seats H,J,K, and Lare the slide-valves I-I,J, K', and L', respectively, the same being provided with ports X,situated about midwaybetween the ends of the same. As shown in Fig. 2, the valve-seats have a straight or dat bottom wall Y and inclined side walls Z, while the working. faces of the valves are correspondingly shaped, thus providing increased means for maintaining a close joint, it being noted that a close joint is thus doubly assured, for if the joints formed by either of the inclined sides should be broken the joint between the bottom of the valve and valve-seat will hold-the pressure. The said valves are shorter than the valveseats to allow sufficient play to open and close the ports in the bottom of the valve-seat, the valve also projecting above the seatsLso that the stems A', passing through openings in the ends of the chambers, may be connected therewith. These stems are connected by pitmen B with the crank-shaft C', mounted upon the arms D', said crank-shaft C being operated by the lever E. The connections between the valves and the crank-shaft are such that the valves K and Lare reversely operated while the valves H and J are reversely operated and also reversely as regards the adjacent intermediate valves K and L.

The operation'is as f ollows: When the parts arev in the position shown in said drawings, the passage of the water is shown by the arrows, the arrow in passage T showing that the water has lilled the chamber D, the valve H being closed. Valve K being opened, the water is passing through passage R to the lower-side of the cylinder. Valve L being closed and valve J being open, the water passes from the upper side of the cylinder through passage U, chamber F, and port N to the exhaust. Upon turning the rock-shaft C' the position of v each valve isreversed, reversing the passage of the water through the diierent passages and making the pressure at the upper end of the cylinder and the exhaust from the lower end.

Among the other advantages which I claim IOO `for my invention is the fact that the working faces of the valve and valve-seat are protected from the rush of the water when the valves are opened. In Valves ordinarily in use in connection with high pressure h ydraulic motors the water passes over the working faces of the valve and its seat when the Valve is open, and owing to the high pressure under which the water is maintained these working faces are injured,and thus reduce the life of the valve, probably owing to the impurities contained in the water, which, although minute,are sufficient under the high pressure of the water to cause this result. In my invention it will be noticed that when the water passes through the valve it does not come in contact with the faces of either the valve or its seat, and thus these parts are not subjected to the wearing action above referred to.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A Valve chamber having inlet port, valve-seats in the bottom of said chamber having ports for communication with the opposite sides of a hydraulic cylinder, auxiliary chambers, passages leading therefrom to said valve-chamber and reciproca tory valves having ports substantially midway between the sides and ends thereof to register with the ports in said valve-seats, and means for reciprocating said valves.

2. A chamber and auxiliary chambers, an inlet-port to the intermediate chamber, valveseats in all of said chambers, each having a port substantially midway between its sides and ends, alternately oppositely movable slide-valves fitted to said seats and each having a port transversely therethrough substantially midway between its sides and ends, exhausts from the opposite sides o1' the ports of the auxiliary chambers, connections between the ports of the intermediate chamber and the upper and lower sides of a hydraulic cylinder and branch passages from said connections to the auxiliary chambers, and means for reciprocating said valves alternately, reversely in opposite directions.

FRANCIS E. COLLINS.

Witnesses:

HUGH P. GOLDEN, MARGARET R. GOLDEN. 

